Malicious PDF — malware analysis report

Static analysis result for SHA-256 756422fc3f81995f…

MALICIOUS

PDF

50.1 KB Created: 2020-08-19 06:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ad980beda59873b4bdaf7b49d876ba5 SHA-1: 008f2fb0c2e20ebcb57da5d3c462da73d93df363 SHA-256: 756422fc3f81995fceabc01e4854181841c76a32825f51e79394ff369c0e3009
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a primary malicious redirector URL, suggesting an attempt to drive traffic to a malicious site. The document body, though heavily obfuscated, contains the malicious URL and references a resume, indicating a lure. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or scam attempt.

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=cognos+report+developer+resume
    • http://files.independentdrcme.net/uploads/1/3/0/7/130775825/xofojazimuxod_wubolutosamoto_divanusekonib_nivezi.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.kimmariejohnson.net/uploads/1/3/1/0/131070604/varem_kifilejav_garuruxaxuje.pdf
    • http://files.littlepipsparties.com.au/uploads/1/3/0/8/130874641/guvibutavip-geraliluv-borofebamena-bugajokaberu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/que_es_ayurveda.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/xotofivavagobuwuxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/salesforce_lightning_web_components_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/wogejagodazoloni.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8052/files/97289735070.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/guvasepovon.pdf
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/nekegibanalazipob.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/jafoxopobusefuxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/34478846689.pdf
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/latest_biodata_format_for_marriage_doc.pdf
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/ben_bagdikian_the_new_media_monopoly.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/allen_carr_arrter_de_fumer_tout_de_suite.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_off0000821b.bin
11f69a4cb595da38256f55f2e52a1188f115372ea7758e4e366485d5e5270f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821B 5032 bytes
font_01_sfnt_off00009327.bin
2631f09deb13b6e2be4419ba5557a41d17309314896f322e7e240e639dd4e62f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9327 12824 bytes

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