Malicious PDF — malware analysis report

Static analysis result for SHA-256 084cc5d55cd85ad7…

MALICIOUS

PDF

39.4 KB Created: 2020-07-29 06:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2bcbcee58e856cbc5a45ead6dd24500 SHA-1: c089ce21bf9f317bc2d3a8b1b0fe4b69fd4fa40c SHA-256: 084cc5d55cd85ad7a3a43836494c698430627c236dd088be2d5c032ee65f226e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, ultimately redirecting to a malicious domain. The document body, though heavily obfuscated, suggests a lure related to 'CCNA lab guide', indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/pify?keyword=ccna+lab+guide
    • http://files.wcgme.com/uploads/1/3/0/8/130813134/gawemixojamumofador.pdf
    • http://files.rcdavis-tellinstories.com/uploads/1/3/1/3/131383624/ebc2656e5828c5.pdf
    • http://files.markdavidkaufman.com/uploads/1/3/1/1/131163788/vuvivaxokawirol.pdf
    • http://files.healingrootshypnotherapy.com/uploads/1/3/1/4/131406659/pavozorare-woxupoti.pdf
    • http://files.ourcrazyratadventure.com/uploads/1/3/1/6/131606280/f0a14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/80793893357.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/76953301725.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69296453687.pdf
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/28041446479.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/55047859367.pdf
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/49274038054.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/tibiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/tugeravipugerina.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/malugul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/sinuxapawepak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/51792712830.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/wetejanumuvavujelobaza.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f14.bin
e333c024b981d4b76697fed0c0211da078dcde7951d547e16c31b1647319b87b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 4688 bytes
font_01_sfnt_off00006f00.bin
bc5a2ef80d1a4bebc6fbeaeaf3ae4b071346f6539e3b6d86a1165c8cf6afc5c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F00 9952 bytes