Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d502dafe00b66bb…

MALICIOUS

PDF

40.5 KB Created: 2020-08-01 06:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 586722c5c1abf1f165edb0a24b5a0556 SHA-1: 4b30539087feca51bde1016ab7bbe4b3510b8c23 SHA-256: 0d502dafe00b66bb7e9af70cc9228052f6d14f66fbf99f02a633e68fe3c9a554
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content, potentially as part of a phishing campaign.

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=javascript+event+listener
    • http://files.brightonbeachsurfshop.com/uploads/1/3/2/3/132303035/zatizisodubanojal.pdf
    • http://files.ginconferencegindc.org/uploads/1/3/0/9/130969800/molowujoxejer.pdf
    • http://files.shannonmariemakes.com/uploads/1/3/1/1/131163851/gobefavimuve-koxatimufir-zikenali.pdf
    • http://files.dpbhouse.com/uploads/1/3/0/7/130739719/sebatolurususoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/47701777956.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/16335295578.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/2166-_8-_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/59517740171.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/zubed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/90827029904.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/logitech_z-_640.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/pijapoxikipuwozutuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/19091195782.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/46085478555.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1095/files/boberofo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006128.bin
2d960846934a1f0c05aa6ea1b12b26949439b09fa3bbd634bed779cd942e322a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6128 4976 bytes
font_01_sfnt_off0000722b.bin
6e339596a57376fda850d906d6b4ed0d573b3ca734cabc4e129dfa2ddec870e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 10300 bytes