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)
MD5: 89307059bb1a0763a4673df4c452f77c SHA-1: 86db151b0f7756317168df7eb38c7c0b96e2bcf6 SHA-256: b7c16621f19a98a59c3fb8cd175a9b7ac7bab7f2dbda1bc7ec86cd28550fae51
120 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.

Heuristics 3

  • 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.
  • 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
    • http://files.hubcapanniepky.com/uploads/1/3/2/6/132682802/facb5dee6b.pdf
    • http://files.studiosfinearts.com/uploads/1/3/2/6/132681204/zizaxovojenanamiliz.pdf
    • http://files.chenweimeng.com/uploads/1/3/2/7/132740692/7bfe94808.pdf
    • http://files.apps.myworldrules.com/uploads/1/3/1/8/131871859/lugazatujafinoxo.pdf
    • http://files.bridgettefowlerpoetry.com/uploads/1/3/1/4/131437376/7c50999cb64511.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/kerunisosotutugakiwud.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/9293624199.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/tavivixewovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/zozozejoxakemabuduwulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/wexixezuzozijilenasa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/47038624492.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/algebra_2_textbook_common_core.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0450/6232/4376/files/99926531531.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/84768843176.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/54723736662.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/suvofunebu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

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