Malicious PDF — malware analysis report

Static analysis result for SHA-256 5505265459b98c7c…

MALICIOUS

PDF

63.9 KB Created: 2020-08-14 13:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6f452c57bc8072b5931d67b120c531f3 SHA-1: b91b7b7cc0069f69b562c726ae0b3c0c21228011 SHA-256: 5505265459b98c7c62f5ca2bf97a42dbe38b06cc282e4c7d5acac6070d501abd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, contains text related to expenses and a URL that appears to be part of the lure. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content.

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=direct+and+indirect+expenses+list+format In PDF document text
    • http://xerok.amominoldnewcastle.com/uploads/1/3/1/4/131483083/4d560e0.pdfIn PDF document text
    • http://files.fleurdemain.com/uploads/1/3/0/7/130738714/f3e2b.pdfIn PDF document text
    • http://bojowi.stefankutsarov.com/uploads/1/3/1/4/131409200/nabojugijokite_kijut_bonutavavabewu.pdfIn PDF document text
    • http://nopog.jordanjmiller.com/uploads/1/3/0/8/130874523/fc1a9da5.pdfIn PDF document text
    • http://files.stephaniegstark.com/uploads/1/3/0/8/130813859/9370823.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/juperuwefoxizerobeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8503/6708/files/bowewanakobipodinotima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/41711603503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/complex_numbers_formulas_class_11.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/nelapujupuvasitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/toxuzalogilunaxobixokago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/97956650272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/32751940777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/sodolunesixuniwafifozijez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/10277363494.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA51F 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off0000af19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF19 5156 bytes
SHA-256: 675b1f61a5c87062eb6b942ebadf870db9997796ac19b49b380406e9904b4dc6
font_02_sfnt_off0000c088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC088 9860 bytes
SHA-256: fb04df0aa253dd696ef5d08e27c4bebeb0e08efdd498c590617a239d18ac166a
font_03_sfnt_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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