Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c16621f19a98a5…

MALICIOUS

PDF

46.1 KB Created: 2020-08-09 11:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89307059bb1a0763a4673df4c452f77c SHA-1: 86db151b0f7756317168df7eb38c7c0b96e2bcf6 SHA-256: b7c16621f19a98a59c3fb8cd175a9b7ac7bab7f2dbda1bc7ec86cd28550fae51
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external websites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=system+analyst+skills+pdf'. Another critical heuristic flagged the document as a link farm, with numerous links pointing to Shopify domains, suggesting an attempt to distribute malicious content or engage in SEO abuse. The document body text, though partially corrupted, contains the phrase 'system analyst skills pdf', likely used as a lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=system+analyst+skills+pdf In PDF document text
    • http://files.hubcapanniepky.com/uploads/1/3/2/6/132682802/facb5dee6b.pdfIn PDF document text
    • http://files.studiosfinearts.com/uploads/1/3/2/6/132681204/zizaxovojenanamiliz.pdfIn PDF document text
    • http://files.chenweimeng.com/uploads/1/3/2/7/132740692/7bfe94808.pdfIn PDF document text
    • http://files.apps.myworldrules.com/uploads/1/3/1/8/131871859/lugazatujafinoxo.pdfIn PDF document text
    • http://files.bridgettefowlerpoetry.com/uploads/1/3/1/4/131437376/7c50999cb64511.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/kerunisosotutugakiwud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/9293624199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/tavivixewovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/zozozejoxakemabuduwulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/wexixezuzozijilenasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/47038624492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/algebra_2_textbook_common_core.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6232/4376/files/99926531531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/84768843176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/54723736662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/suvofunebu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6943 5040 bytes
SHA-256: 5dcb720e521d85cb47a9d7e18f98ca749e7cd52f53b83df64a57849537a3e8f5
font_01_sfnt_off00007a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4E 10092 bytes
SHA-256: 4575256da9b29b6770dfe7f04c48aea87d68bb528d4c9d71c69ad3f6583456cb
font_02_sfnt_off00009ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176