Malicious PDF — malware analysis report

Static analysis result for SHA-256 1263318c43070a4d…

MALICIOUS

PDF

42.1 KB Created: 2020-07-31 21:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4315ffa6f8d9431ea80b4546c96da452 SHA-1: bc98ffc9bb3edc3138030f8e82d13d76b54ddd01 SHA-256: 1263318c43070a4d33e9546768c3ca26d5fdb96b2ee774f9d64da2ada234b1b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used as a pretext to display a fake 'exe has stopped working' error. This indicates an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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.cc/pify?keyword=exe+has+stopped+working+meme
    • http://files.hushupclothing.com/uploads/1/3/1/1/131164202/5522390.pdf
    • http://files.aslightmistakeinthecode.com/uploads/1/3/2/8/132815206/feseba.pdf
    • http://files.cultivateyourwellness.org/uploads/1/3/2/6/132681664/mavaxa_zogiwezile_sabunevajuzag.pdf
    • http://files.sherwoodoregonlawncare.com/uploads/1/3/0/7/130775017/8257033.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/mepodamepun.pdf
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/lemod.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/68627932496.pdf
    • https://cdn.shopify.com/s/files/1/0438/1884/4322/files/67289301741.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/43011244409.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/navikufebowam.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/xaxaborelidozoxawuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/71611068049.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/45528688623.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/xagusivijivemosexe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065db.bin
4f8b7a30e1d33076951c781264ba6d83e294f633f86cb26093628580d2cd2e03
pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB 5520 bytes
font_01_sfnt_off00007896.bin
c799576fd9937397066dc30b1a899fb1932e838f845849a22c142facb820945a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7896 10328 bytes