Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a00536870bf681e…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 20:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0765143db36a30973e460f2c6afa067 SHA-1: 35895c1ec66fadbc7621636b9e857acb189f6c6e SHA-256: 0a00536870bf681e34cf4632f21354c2159517eb4143e7c3c80fa63c9fa9ef7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector (ttraff.com). The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to generate traffic or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve as a lure to direct users to malicious sites for further exploitation.

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=purpose+synonym+formal
    • http://jazarabif.ccioh.com/uploads/1/3/2/7/132712615/3466379.pdf
    • http://vonapiw.pinchalog.de/uploads/1/3/0/9/130969220/gerefuwen.pdf
    • http://files.ivyshi.org/uploads/1/3/1/3/131379296/zonelaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5347/3189/files/65978554449.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4023/files/finetezifotoresoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/dulojudokawovubofevuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/34170049571.pdf
    • https://cdn.shopify.com/s/files/1/0461/5346/6019/files/canon_lide_110_scanner_setup_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/41365495812.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/lacoste_shoe_size_guide_uk.pdf
    • https://cdn.shopify.com/s/files/1/0447/9421/6599/files/59595700467.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/94402266820.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000606c.bin
e81f74bbc9c0fccc9afb5d3bc8b115f27dad2d68c8f666898f1c4afee3a443ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 4904 bytes
font_01_sfnt_off000070f8.bin
1158ae57070463e6f2c498c7cc5168faeee58222ba14f2fce58f941ee942b87c
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 10480 bytes
font_02_sfnt_off00009444.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x9444 4324 bytes