Malicious PDF — malware analysis report

Static analysis result for SHA-256 80958c03c0f50e80…

MALICIOUS

PDF

41.4 KB Created: 2020-07-20 01:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec594f70107e1a16226bd1571afb0f66 SHA-1: 0fa30542d95403769ecfdf001ff019d629de3245 SHA-256: 80958c03c0f50e8065c801cadce7fd4978e3a78bf443d37d671e1520fe83db92
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external PDF files, many of which are hosted on WordPress.com, suggesting a link farm or SEO abuse. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/wb?keyword=cfmeu%20rdo%20calendar%202017%20vic%20pdf'. The presence of a 'download button' lure further supports the malicious intent. While no scripts were extracted, the overall structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=cfmeu%20rdo%20calendar%202017%20vic%20pdf
    • http://files.katherinefusco.com/uploads/1/3/1/4/131408930/sanobaxelof.pdf
    • http://files.mpflynngroup.com/uploads/1/3/0/8/130873951/5607014.pdf
    • http://files.approachapparel.com/uploads/1/3/1/3/131383664/8009279.pdf
    • http://files.juliewiegand.com/uploads/1/3/1/4/131453480/dd1b72145be5fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://tigifelaziv.files.wordpress.com/2020/06/nowode.pdf
    • https://vizivalafis.files.wordpress.com/2020/06/25940175278.pdf
    • https://tamiriwuwaxo.files.wordpress.com/2020/07/dewipezasureduvabut.pdf
    • https://gegiguwesaf.files.wordpress.com/2020/07/somigopapitipi.pdf
    • https://tetajis.files.wordpress.com/2020/06/sevemofo.pdf
    • https://rufumeridap.files.wordpress.com/2020/06/58614755871.pdf
    • https://vajepevugu.files.wordpress.com/2020/06/12343701835.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/56673219945.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5663/files/damenevixuselogem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/38357864584.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/12556317287.pdf
    • https://cdn.shopify.com/s/files/1/0435/7505/0395/files/gifarizaxubasuvadade.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/lavonomejufexapijogira.pdf
    • https://cdn.shopify.com/s/files/1/0429/5294/9913/files/luribepupadigiretozib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jenodilibaxu.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_off000063fd.bin
905df9c50f2e11182a20bb5cc36c3aad39d412472e264f19b29ef44b10064474		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 5412 bytes
font_01_sfnt_off00007651.bin
04b9205003414c96f7cea0fe393185afab8fce7a8d58d23038e6f6183f6db063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7651 9932 bytes

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