Malicious PDF — malware analysis report

Static analysis result for SHA-256 25140dcda4a5dcfe…

MALICIOUS

PDF

47.6 KB Created: 2020-08-03 19:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37a3866363cf6a652816eac74a288d01 SHA-1: d9303ba3ecc6b2e85889b9436df88e14b44eb157 SHA-256: 25140dcda4a5dcfeafb68ec95461e6fa9f01564d01c5994446a3a5291cd46b97
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external PDFs, a technique often used for SEO poisoning or to host malicious content. One of the embedded links, 'https://ttraff.cc/pify?keyword=the+future+of+artificial+intelligence+in+digital+marketing+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure via a deceptive lure.

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.cc/pify?keyword=the+future+of+artificial+intelligence+in+digital+marketing+pdf
    • http://files.newbusinessaccounting.co.uk/uploads/1/3/1/4/131437380/tevaperubapub.pdf
    • http://zabek.fabiolapiedadmariaalicia.com/uploads/1/3/1/3/131379012/407752.pdf
    • http://files.limogescollections.com/uploads/1/3/0/8/130874101/fafoba-jovapure-wosidame.pdf
    • http://files.rbowtique.com/uploads/1/3/0/9/130968994/pewozi.pdf
    • http://files.dkgthetaomegaca.com/uploads/1/3/0/8/130874381/wirigup.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/rukanipojazitusag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/42377443633.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/33636917488.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/86421529557.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/33182198180.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/427800804.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sitomomuwarusubewikujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/biwadepiwotesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/63587009881.pdf
    • https://cdn.shopify.com/s/files/1/0437/1929/5130/files/forumamebavodifolegitu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/86792826006.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruxejuvekega.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078fd.bin
c3789e8ba12ca6e2ea7d25e827473f10cc7ce4dfe3889da48099dcdfe35ebc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FD 5404 bytes
font_01_sfnt_off00008b2f.bin
59d40bb037530023e506e13e549fadda60c9e639f937cfd6cbf0d6ae5af35e66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2F 11164 bytes

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