Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c979de926d943e…

MALICIOUS

PDF

46.8 KB Created: 2020-08-19 07:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc5e03a7eb0f6ddfe5fdffbf5b4e651b SHA-1: 698ed1936caa16ad9ad1fb508ac4af3222968ab3 SHA-256: 39c979de926d943e57bc16ea533aa4d18f5951f2a4fb505f3d4e49aae22b8d53
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL (ttraff.com) with a keyword suggesting a lure for a game mod. This is further supported by heuristics indicating the PDF is a malicious redirector and part of a link farm. The document body, though heavily obfuscated, contains the same malicious URL and keywords, reinforcing the social engineering attempt.

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=animal+jam+apk+mod+android
    • http://newoduvo.hempologyabq.com/uploads/1/3/1/3/131398473/04d80dc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/vupopo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/30435179584.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/598808668.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4950/files/javascript_format_date_yyyy-_mm-_dd.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/bacterial_meningitis_guidelines_2016.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/chaturanga_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/guterowefivitaraminuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/99380741361.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/door_opening_sound_effect.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/vokosavevi.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/brand_positioning_workshop.pdf
    • https://cdn.shopify.com/s/files/1/0434/2916/7270/files/68417909722.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/gifamivivajubosukusofuj.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_off00006525.bin
f1e666231e58a29afa035bffd90c207ea6e7a916367cbeff96f1038c9d3a7435
pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 5056 bytes
font_01_sfnt_off00007638.bin
bcfe3a8a057ee6c701a159cad437dc3c0161ed2e740ad2f88f4c76a897e82645
pdf-font-stream PDF embedded font (sfnt) at offset 0x7638 10184 bytes
font_02_sfnt_off0000996a.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
pdf-font-stream PDF embedded font (sfnt) at offset 0x996A 16092 bytes