Malicious PDF — malware analysis report

Static analysis result for SHA-256 808e922d0470e7bd…

MALICIOUS

PDF

45.2 KB Created: 2020-08-27 18:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b14b8779a95a4d0a6878c2172d8cace SHA-1: 22defb81ed168d3e389df9b38f0560fdd291e9e3 SHA-256: 808e922d0470e7bd8d8475d4fad3c6e1543e039d3bd7334d315727dbba7dd29f
152 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier with high confidence. It contains a large number of embedded links, including one pointing to a known malicious redirector at `https://ttraff.club/pify?keyword=interligne+simple+c%252527+est+combien`. The document body text is heavily obfuscated and appears to be generated content, likely to support a link farm or SEO spam campaign.

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.club/pify?keyword=interligne+simple+c%252527+est+combien
    • http://files.learninginafterschool.org/uploads/1/3/1/8/131871852/mokopijojupigerekuze.pdf
    • http://files.katrinafrazer.com/uploads/1/3/2/6/132683005/pijuj.pdf
    • http://files.downsyndromejunction.com/uploads/1/3/2/6/132695329/kivosazug.pdf
    • http://files.columbianacoc.com/uploads/1/3/1/6/131637163/8c35b74b.pdf
    • http://sufan.carolwooten.com/uploads/1/3/1/3/131381369/3974504.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/2636584732.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/dnd_5e_advantage.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/niresh_high_sierra.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/belitazazodojigoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/90431760860.pdf
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/embed_iframe_in_google_slides.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/fuwomopekatefojatipitaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0943/files/62381245131.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6221/files/libros_autoestima_nios.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_off00006530.bin
43559a27fa297a156db77a914283b2ad50fb230060c121af71a333beafda9715
pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 5152 bytes
font_01_sfnt_off000076a0.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x76A0 1800 bytes
font_02_sfnt_off00007f2e.bin
d2e9fdfdc9b962b3786a9237b76bb958f362a150870d6c51feb558b54b4a33cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2E 12088 bytes