Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9abc22fc009470…

MALICIOUS

PDF

46.2 KB Created: 2020-09-10 10:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6e368bcd43f6c085037ada524a8e84a SHA-1: 9708727be6efc0778a2e888e7d19976c8d6eda6c SHA-256: 7b9abc22fc00947087a4ccf521b95110d0f178f755d73486b417189e2b64b9ce
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'android cheats' and the malicious URL, suggesting a lure. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, which are likely part of a link farm to improve search engine ranking for malicious content.

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.club/wix?keyword=bg2ee+android+cheats
    • http://files.janiktremblayhomeopathie.com/uploads/1/3/2/6/132696112/tarusipa-tunewufej-gonebenes-kesifikuzi.pdf
    • http://zifaxujab.thecountryboutiquefl.com/uploads/1/3/1/4/131453943/zurujodoja-degomiwovebep.pdf
    • http://files.thewallssager.com/uploads/1/3/0/7/130775846/zofudaxeluzun-vogake.pdf
    • https://static.usrfiles.com/ugd/db93e9_eff2d4c90b21426cb7cf3240157ed6ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_2118bb7747e146ccbc5113a3c7f1e372.pdf
    • https://static.usrfiles.com/ugd/39a0fd_710c3d624c5c4929b02fd58e25eb54fc.pdf
    • https://static.usrfiles.com/ugd/1e52da_ce33950d235049c7925b788d0f4cae8d.pdf
    • https://static.usrfiles.com/ugd/21b4a7_7804a22918b9490886499f493626ba93.pdf
    • https://static.usrfiles.com/ugd/67e251_df04bbd0b5e0432082968c82e7a4f338.pdf
    • https://static.usrfiles.com/ugd/451461_53e2fa2121f14965bb530ec6512b1184.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/78191343551.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8659/files/bicycle_the_definitive_visual_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/jigarenafufujusetojez.pdf
    • https://cdn.shopify.com/s/files/1/0436/4032/4256/files/biomes_activity_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/80849919093.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d1e.bin
0a3849fdf5da141669b24c34725842177af412be43ca074d9bdd3ba86dd551ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1E 5352 bytes
font_01_sfnt_off00007f4e.bin
2b2f093c653a70d161f44df0203189ec49d01fc0e8d16b87b6dab852de2b6ee5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 14540 bytes