Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd95e679a991a07…

MALICIOUS

PDF

42.7 KB Created: 2020-08-19 12:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586f43957a670d2ed2944d8558407558 SHA-1: d45291d3da8c62e5bf8fd7a2eac325db7c6d9baa SHA-256: 5fd95e679a991a076bc23e9bd321e6dbf588c7b9bdac3775be04fb74c0caade0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the PDF is designed to direct users to malicious infrastructure, likely for phishing or malware delivery.

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=formlabs+castable+wax+burnout
    • http://files.minnesota42.com/uploads/1/3/1/6/131636775/xebolopoxenuxug-pilusijugatu-pidodopir.pdf
    • http://piluxujen.coheartgallery.org/uploads/1/3/0/9/130969179/4898171.pdf
    • http://files.andrewogus.com/uploads/1/3/0/8/130814232/megeruwa_votisojagokida_fisopozol_vamivej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/capsule_size_chart_acg.pdf
    • https://cdn.shopify.com/s/files/1/0448/3776/5282/files/45076409882.pdf
    • https://cdn.shopify.com/s/files/1/0430/4125/9671/files/jalomurefuxibakavevozenu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4750/8376/files/kudejosabajukarij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/dutuxadoxirifebadegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/gujarati_to_english_barakhadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8458/6909/files/23642076880.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/dieta_gastroenteritis_aguda_fisterra.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/date_plus_days.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_off00005c85.bin
ab41dc3b52f064953bb866c666b28f10e6da077eeeffec73ca0d80df3c93694e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C85 5032 bytes
font_01_sfnt_off00006d9c.bin
f1f3b2b2c700b04dbd1a3d36e26248f1e9722f501ae67d82e0e66333181fe5d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9C 10088 bytes
font_02_sfnt_off00009013.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9013 4324 bytes