Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2ae4c9ec8d7072…

MALICIOUS

PDF

43.8 KB Created: 2020-08-05 06:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb035dc1b33507541a39bf031e05b702 SHA-1: d5920a660bedf95209e081de5e4844e552a958c9 SHA-256: 9f2ae4c9ec8d7072d93da9d89bda6b0840c6a2e8ab2ad8737662263dc9860516
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm pattern, embedding a large number of external links, many of which point to potentially compromised Shopify domains or other unknown hosts. The document body, though heavily obfuscated, contains URLs that align with the observed malicious redirector and link farm behaviors.

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=bosque+tropical+perennifolio+pdf
    • http://files.seectimeout.net/uploads/1/3/1/8/131871622/jitabatas.pdf
    • http://fofupolor.abcformepreschool.com/uploads/1/3/1/4/131407005/luduwilo-vevax.pdf
    • http://files.nineacresfarm.com/uploads/1/3/0/7/130776366/nusijepaneli_wuvorebo_roted_bakudu.pdf
    • http://files.littlequiltcreations.com/uploads/1/3/1/1/131164236/gugudatutasuke.pdf
    • http://files.beyondthemasks.net/uploads/1/3/1/4/131438059/2190231.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mapitawaluzosamorexub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1891/0870/files/waxazujomifiwu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/vivegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/53965978102.pdf
    • https://cdn.shopify.com/s/files/1/0438/5066/2053/files/zenazezazox.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/kiran_psychological_aptitude_test_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/kavufinokiza.pdf
    • https://cdn.shopify.com/s/files/1/0447/7802/9213/files/brainwashing_the_science_of_thought_control_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/46081249038.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/jivufudev.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/16235641286.pdf
    • https://cdn.shopify.com/s/files/1/0435/5643/8165/files/susujibujalafo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/hidradenitis_suppurativa_diet.pdf
    • https://doi.org/10.21829/abm90.2010.299
    • 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_off00006ce5.bin
1d56ef58b51a3d329f2e681c05b9513cd2e8628c38def348d95b21f1aaf0cfb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE5 5324 bytes
font_01_sfnt_off00007f10.bin
7afaa7f5f6bee8123481a8dd9f1b01e8e21a1ba73fcf2044ec0c7f8b4434b1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F10 10208 bytes

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