Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ab8f06cae35dee…

MALICIOUS

PDF

43.1 KB Created: 2020-08-02 22:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ae6243f442c31f2ea16b4f06aaae89 SHA-1: 239043aa44bb1e7a87b92b233c8ba166a098f64e SHA-256: f6ab8f06cae35dee888b05dc648f62b3ade9e0d39957bdb95818f46d7cf212cb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong likelihood of this document being used for malicious redirection. The ML classifier also flagged this PDF with high confidence. The presence of the URL 'https://ttraff.ru/pify?keyword=animal+magnetism+osrs' suggests an attempt to lure users to a malicious site. No scripts were extracted from this sample.

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.ru/pify?keyword=animal+magnetism+osrs
    • http://files.flyit.com/uploads/1/3/0/8/130874097/ziwosajodejuxelagim.pdf
    • http://files.juicyscoopwithheathermcdonald.com/uploads/1/3/2/7/132740798/mebonebaxag_mofirigo_dejorukomivopu_ledalod.pdf
    • http://files.subparmotorsports.com/uploads/1/3/0/9/130969220/kagesoxidote-musejum-mezotutukar-wizaxem.pdf
    • http://files.christykiespertpianostudio.com/uploads/1/3/0/9/130969110/wojugevifanenin_guduxamigevolaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/58767089175.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/15580988464.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/57237083703.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/wimaxobejubodetujuwujiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/xegebozegebagi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/89907711417.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/genevejukuraxipotuzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/85663827759.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/sotowapezunefid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64830269039.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cfb.bin
b4a9130907c99301eb4279295cc1071e54634d8ae42275660ce7b7cef9e4967d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFB 4996 bytes
font_01_sfnt_off00007ddc.bin
a960c946fc6d88d574436189c3eaa2a8b3044c0581449eada808a9567bf19faa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDC 10052 bytes