Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ec9a47b3c3f4bb…

MALICIOUS

PDF

40.0 KB Created: 2020-09-01 08:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28b2a36fe6070b090f5b289ffbcb8438 SHA-1: b2dc595af1723300f6b1f721d872b7a68a0cf1aa SHA-256: e0ec9a47b3c3f4bbfd89d69fe606e6286cc7dda24c9d28c1007d3f0bc4ee74e1
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title related to 'Ceo delhi voter id card' and embeds a large number of links, many of which point to a redirector service. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.com/wix?keyword=ceo+delhi+voter+id+card as malicious. The PDF_SEO_LINK_FARM heuristic indicates a link farm, with the first URL being https://cdn.shopify.com/s/files/1/0459/5413/8271/files/tamilrockers._com_movies_2018_tamil.pdf. This suggests a social engineering attack aiming to redirect users to 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.com/wix?keyword=ceo+delhi+voter+id+card
    • https://cdn.shopify.com/s/files/1/0459/5413/8271/files/tamilrockers._com_movies_2018_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/mazorubakezusifuwevami.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/angulos_suplementarios_ejercicios_resueltos.pdf
    • https://cdn.shopify.com/s/files/1/0435/8720/7327/files/exercises_present_simple_1_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/0790/0835/files/48527622673.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/kutirovoguz.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/rusofuxugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4917/files/java_32_bit_jre_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/falumolubew.pdf
    • https://cdn.shopify.com/s/files/1/0463/0354/3458/files/malipokowizita.pdf
    • https://cdn.shopify.com/s/files/1/0435/5591/3879/files/workout_progress_tracker_android.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_172796f63237489ba5bfadfed3096d5d.pdf
    • https://static.usrfiles.com/ugd/a48928_424e01aab580496e8ba5ec7768a49716.pdf
    • https://static.usrfiles.com/ugd/f09a9d_30249bd865184284af4e736806e3e861.pdf
    • https://static.usrfiles.com/ugd/625844_1cdc74e3ecc14a56ae82b6792e048ae5.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_off00004d66.bin
0a0b54d9c7734233c42899cca42d427a409b88e33b428a78274c4ba8c27f42e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D66 4816 bytes
font_01_sfnt_off00005db6.bin
2d5086d4e116f3cf930866299028aef6719cfde33505a31235c0e2d371da53d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB6 9256 bytes
font_02_sfnt_off00007da9.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA9 16164 bytes

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