Malicious PDF — malware analysis report

Static analysis result for SHA-256 114540dda67463d9…

MALICIOUS

PDF

37.9 KB Created: 2020-08-02 00:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c164dc3e3448401df739ec97e2f21e46 SHA-1: 401e1bf916488ff7f0bc7a6a5d0ed0c4ce515cd2 SHA-256: 114540dda67463d95cf1d607477ebe6ae2ee8a8f68e322d7a51cc53ec1c16dbb
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 hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=python+list+last+element', is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to direct users to malicious content, 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=python+list+last+element
    • http://files.myelegantmarriage.com/uploads/1/3/1/6/131606819/lijukudamina.pdf
    • http://files.biogeographyresearchlab.net/uploads/1/3/0/7/130775583/ritise-doseruvuxoravus-runeruzuxerub.pdf
    • http://files.elizabethbaumanart.com/uploads/1/3/1/0/131070109/db22ee9d8f61026.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/zowixofodezota.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/jegadovibapuxivojedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/7129117134.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/tedivugevufiliro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/2304621284.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/pizoxoligomudef.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/fesikojumuxuwavijubifewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/67839969728.pdf
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/232087194.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/nidubifetija.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_off00005917.bin
1001672f1ffc9807a06c197c047ee5b0f69d98b26a5f6172d9beab08370f2c0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5917 4932 bytes
font_01_sfnt_off000069c1.bin
c38fa294afa04c48415fdc0be47b60bc8e3fd3351f07dc20e8f273fbd0768d0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 9736 bytes