Malicious PDF — malware analysis report

Static analysis result for SHA-256 748e351ace458be9…

MALICIOUS

PDF

42.7 KB Created: 2020-08-20 00:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0bcba3dcd19f598d5d699e20f11fda8 SHA-1: d48111fe6e25f1aba3b051373647f41f9fc71036 SHA-256: 748e351ace458be91a84da6d5cedac7eabff3b9a1920e4a8301bd2a5c2633096
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector link, indicating a phishing or scam attempt. The embedded URL `https://ttraff.cc/pify?keyword=adobe+photoshop+7.+0+software+free++cnet` suggests a lure for free software, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious link patterns.

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.cc/pify?keyword=adobe+photoshop+7.+0+software+free++cnet
    • http://files.amarajk.com/uploads/1/3/2/8/132814611/nuwamojeverow.pdf
    • http://files.classyclothingcovers.com/uploads/1/3/1/4/131406412/5432607.pdf
    • http://files.jacquelinenicholls.com/uploads/1/3/2/7/132710795/1940915.pdf
    • http://files.playfulwonders.com/uploads/1/3/2/6/132695543/gowenaxovo-fulafavi-mitifabijenor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/lepotavozenajid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/80888195719.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4659/files/16972650285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/23261152758.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/kupuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/20521831517.pdf
    • https://cdn.shopify.com/s/files/1/0453/8610/5000/files/wowhead_assassination_rogue_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/6380/4058/files/vunexutupojujideka.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/49095231503.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/siwibubuwam.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/makalah_pendidikan_agama_islam.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_off00006764.bin
5b8b47096bac1ad5b8b01fe295bdd4b2f7429dce357cbae16b7258bc5bd08bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6764 5684 bytes
font_01_sfnt_off00007ad6.bin
6f030d9d381ec002ff0261ee3bf81cdb67cbeaa6f9e97eb37db0b715ed801d15
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD6 10052 bytes