Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c040870779bd99…

MALICIOUS

PDF

48.4 KB Created: 2020-08-09 08:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b2f16df99c89712e312fa5c586ccedd SHA-1: b2e03b26cda4fd3189088ff0ce1514926e031b9d SHA-256: 05c040870779bd99ff41342a553e59aee4e0a5f2049adec54f26ff253914b7de
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a "PDF annotator crack" that redirects to the malicious URL https://ttraff.ru/pify. This URL is flagged as a known malicious redirector. The document body and heuristics indicate a lure to download or access cracked software, which is a common social engineering tactic. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=pdf+annotator+crack
    • http://files.morgancountyillinoishistory.com/uploads/1/3/0/8/130814529/laburopagodeg_kaxova.pdf
    • http://files.charactersofcharacter.org/uploads/1/3/1/6/131606260/wukovirozabopon.pdf
    • http://files.straightjoe.com/uploads/1/3/0/7/130775245/wazizokif.pdf
    • http://files.woodsidefarmalpacastore.com/uploads/1/3/1/6/131636689/ludet.pdf
    • http://files.harmony-holistic-center.com/uploads/1/3/0/7/130739201/4348759.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/gemoza.pdf
    • https://cdn.shopify.com/s/files/1/0450/0973/1734/files/speaking_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/74840521493.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/26893318056.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/sazoduxovifixevixupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1851/7665/files/durupotunudidetizebibigum.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/computer_awareness_capsule_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0445/9168/files/79518182435.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/samebuzepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/muting_words_on_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/75495808906.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/present_simple_and_present_continuous_exercises_tests.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/jalaruraxilup.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006852.bin
fddba63b12383b297855f4218aaa4801d8e66836ef0c02a1cebcbe262810f94c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6852 4492 bytes
font_01_sfnt_off00007789.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7789 1800 bytes
font_02_sfnt_off00008017.bin
352eed66976d60bfb40ca15adce02b88c1d9ffd2411f948e6f1f6488349ca4a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 11196 bytes
font_03_sfnt_off0000a656.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA656 4324 bytes

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