Malicious PDF — malware analysis report

Static analysis result for SHA-256 7913db7eda16de2f…

MALICIOUS

PDF

40.8 KB Created: 2020-08-23 19:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a52e3723708fee932348bb89cd7d062 SHA-1: a19fb07afe8251c70a674516f4e46496a6cd4c8d SHA-256: 7913db7eda16de2f9aee8085ad1ab5d9123c3b9d6e2e72057d8916e54b0c337a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains multiple URLs, including a primary malicious redirector and a large number of links to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.cc/pify?keyword=csu+honors+thesis+guide.

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=csu+honors+thesis+guide
    • http://xolos.csno-sdi.org/uploads/1/3/1/4/131437544/5340323.pdf
    • http://mukona.bayareaflightinstruction.com/uploads/1/3/0/9/130969690/zakadogamov.pdf
    • http://files.positivitymagic.com/uploads/1/3/0/7/130738752/vakebuxetul.pdf
    • http://files.mcalpine30days.com/uploads/1/3/2/8/132814136/fesok-rawuvowasomunir-woxetowuma-dekaxetubonisi.pdf
    • http://sulake.decatn.org/uploads/1/3/1/3/131383839/6431152.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8416/9894/files/best_free_weight_lifting_apps_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/tiwedanosabavuzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/autodesk_cfd_simulation.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/mawosisebixojavenerusukul.pdf
    • https://cdn.shopify.com/s/files/1/0461/3390/3513/files/49235832148.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/application_form_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdf
    • https://cdn.shopify.com/s/files/1/0435/8343/9003/files/configuring_sendmail_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/kowibave.pdf
    • https://cdn.shopify.com/s/files/1/0430/7841/8583/files/6887990373.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fc.bin
8870054917ba0ba09da09c1a98225f4c176c4c95237f702c9fa16ea7959f5bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 4752 bytes
font_01_sfnt_off0000721a.bin
7d1d140a088932c1c4ca42850678b1a779c047bd5126f4119470163601a2c83b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721A 10912 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.