Malicious PDF — malware analysis report

Static analysis result for SHA-256 8758a3a5acd44533…

MALICIOUS

PDF

44.8 KB Created: 2020-08-03 20:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04364aef076c120ce61499cc61f29b7e SHA-1: d51bdfdd556b23fb946d029219920d4d580814c6 SHA-256: 8758a3a5acd4453395abcc3f2396058a678a113b61f9534e8430b4d78f01defd
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 resources, indicating a link farm. One of the primary links redirects to `https://ttraff.ru/pify?keyword=media+company+profile+template+pdf`, which is flagged as malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the same malicious URL, reinforcing the intent to redirect users. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=media+company+profile+template+pdf
    • http://files.soundcityreading.com/uploads/1/3/1/4/131407665/dixukowibuguvagolur.pdf
    • http://files.aprilsurgent.com/uploads/1/3/1/8/131872017/xenelazimi-dotizebaweximak.pdf
    • http://files.rebekahlpurdy.com/uploads/1/3/1/1/131164076/9543912.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0433/6040/files/60150118758.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/powojomevopozamajalosi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/48352574992.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/30007272239.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/roller_coaster_tycoon_iso.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/nivuzadawidub.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/95259005354.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/andrew_evans_911_cobra_777_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/voramuta.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_off000063fa.bin
426bee0b38bac2e02b46c88370ec81effad6faf96b6a863dc49741930b4b8ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 5016 bytes
font_01_sfnt_off000074f5.bin
c644a08d45aa077a6aed28e327dc8faaf2e2d74c0ae13ce1d88b7e295cd92e68
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F5 10376 bytes
font_02_sfnt_off00009835.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 4324 bytes