Malicious PDF — malware analysis report

Static analysis result for SHA-256 487504fbc0ab87a0…

MALICIOUS

PDF

40.6 KB Created: 2020-08-23 22:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca59fd6d17c9aa005e9f7754621f7b62 SHA-1: 773f7085aff4937d7fd5cfac18237046501418b1 SHA-256: 487504fbc0ab87a0715ad2b7a269424ca70bba9180e73a418a1b2df65c674673
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=unfailing+love+evie+sheet+music'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests a large number of outbound links, many hosted on cdn.shopify.com, further supporting a content-driven lure. The ML classifier also strongly flagged this PDF as malicious.

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=unfailing+love+evie+sheet+music
    • http://goxovu.tabithafitness.com/uploads/1/3/0/7/130738870/1844247.pdf
    • http://bujaxorov.mrexham.com/uploads/1/3/1/4/131405927/1720699.pdf
    • http://files.championshipvision.org/uploads/1/3/0/7/130740530/0771c39f596686.pdf
    • http://files.grounded-infrastructure.com/uploads/1/3/0/7/130740249/zujapezabewuwibozum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/69746098134.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/73849292416.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/8051744188.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/rudulojud.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/87687640701.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9284/files/proyecto_de_investigacin_libros.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/cartoon_movies_mp4_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/dd_form_2981.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7596/files/83647512185.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/59867262731.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/jbl_charge_3_bluetooth_speaker_driver.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_off00005286.bin
3c9f5d31840e3a0e46b15392894552dd3cfcb601b43feace5784a4eb8c87ca4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5286 5132 bytes
font_01_sfnt_off000063e7.bin
ba60576c5f86ad9c82a489695c96a5bc2c506ed54a905bdf2e52fcad0ad6145f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E7 10428 bytes
font_02_sfnt_off0000874c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x874C 4324 bytes

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