Malicious PDF — malware analysis report

Static analysis result for SHA-256 7087b0f2230bd3fc…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 07:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50cab657e926fc03e48ce18137f7593b SHA-1: 5ba90ba8de4d7c6c9328fa7ede6536a951baa480 SHA-256: 7087b0f2230bd3fc7f3fe5a019d65ce5ef469c322f004a0ab6ea004a49544f37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically `https://ttraff.com/pify?keyword=beauty+salon+logo+templates+free`. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a SEO poisoning or link farm attack. The ML classifier strongly supports the malicious verdict.

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=beauty+salon+logo+templates+free
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6794/0765/files/becoming_a_supple_leopard_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/90872503835.pdf
    • https://cdn.shopify.com/s/files/1/0430/9958/6714/files/blade_runner_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/91095913802.pdf
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/8894630480.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/dudefulunimomuwurazireg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/51187514305.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/robola.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/bass_guitar_fretboard_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/30370070704.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_off000053af.bin
eb06683e590b92f6e0b4114ed2652abf8846cf5147e7789437f708e87584a076
pdf-font-stream PDF embedded font (sfnt) at offset 0x53AF 5204 bytes
font_01_sfnt_off00006558.bin
53a5b6306b9f5630bc30788abbad704e8fa6541accd411b9c05496aaee64c6d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6558 9520 bytes
font_02_sfnt_off000085dd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x85DD 4324 bytes