Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7882a6dcc3266c9…

MALICIOUS

PDF

58.9 KB Created: 2020-08-03 11:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33dabcb7224c3a430afff151358d1004 SHA-1: 4e5c20540032e5040dbeab13bfcf1823ac89eedc SHA-256: e7882a6dcc3266c9ec7fcb4783ff06a79b901e9a018365059d6b79c95b4ef4a0
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, https://ttraff.com/pify?keyword=wastewater+treatment+process+journal+pdf, points to known malicious redirector infrastructure. The document appears to be a link farm, likely intended for SEO manipulation or to distribute further 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/pify?keyword=wastewater+treatment+process+journal+pdf
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdf
    • http://files.wowfactorcards.com/uploads/1/3/0/7/130738559/lexidemigoferezi.pdf
    • http://files.doublejackoilfield.com/uploads/1/3/1/6/131636737/patijafuzat-bodimegasulude.pdf
    • http://files.hivetextension.com/uploads/1/3/1/0/131070109/tofawedijizaxun.pdf
    • http://files.demornewarrenddub.com/uploads/1/3/1/4/131409170/dakodup-simegi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3201/7058/files/78873902583.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/habitable_zones_student_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/nosezifatitirobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/70346444346.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/30949244257.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pubasujarudewuz.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/southwest_check-_in.pdf
    • https://cdn.shopify.com/s/files/1/0437/4442/8181/files/bodilaferodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/89544837339.pdf
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/96895845340.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/demuxufaxaxijuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/55047698944.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/pegelujanezoxogad.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/section_4_3_biomes.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/
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/section_4_3

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009469.bin
f8029d051d275fdfa59d3ea8abe414fd0458dce7085b6c3aae8120ddc5cdecb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9469 5480 bytes
font_01_sfnt_off0000a70f.bin
a6a3fe6f53e248491847d790fa9f3ec0d7e7bab5d6853c44ece7b46f200b0642		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA70F 9936 bytes
font_02_sfnt_off0000c955.bin
ba834fc636dff166406c4e67dad98ffca05097b0f45121e4a1b03581ce0bd953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC955 16100 bytes

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