Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33b33cad0fb20ab…

MALICIOUS

PDF

49.0 KB Created: 2020-08-04 19:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0c6b35bf8e5dbe4cf9f0d778517c953 SHA-1: 968fefd1945419ed78f2bc0cfc43c78e447e0491 SHA-256: b33b33cad0fb20ab700bd97557e495e7e1883c4ac85ea61ebb090f89374aa384
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that redirects to a malicious domain, and numerous other links point to external PDF files, suggesting a link farm designed to manipulate search engine results or distribute further malicious content. The primary malicious IOC is the redirector URL.

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=four+personality+types+pdf
    • http://files.fishersflowers.com/uploads/1/3/1/3/131380390/f94bbf089be40a1.pdf
    • http://files.nowherehuman.com/uploads/1/3/2/6/132681836/6156634.pdf
    • http://files.drkayecase.com/uploads/1/3/2/7/132740905/9790658.pdf
    • http://files.smworks.org/uploads/1/3/1/6/131606901/jabekebaxemubef.pdf
    • http://sokebo.baljagat.org/uploads/1/3/2/8/132814476/soxin-direlabev-vebot-pujox.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/bobuweranuvafuguxoti.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1357/files/65717317008.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/29529541313.pdf
    • https://cdn.shopify.com/s/files/1/0436/6719/4021/files/88604350295.pdf
    • https://cdn.shopify.com/s/files/1/0432/0306/8068/files/lajodewekoxemodenujin.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/51810196917.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/11969714117.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/kuregalisomomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/83724505072.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/linear_algebra_and_its_applications_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/39091765427.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/12974718856.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/3d_seismic_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0440/3075/4966/files/sigekoxakanimen.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/17140712657.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082a4.bin
951f3d073dc637624d8a78005bea206f7aa85258672eae3c7d1d771e91e7c8d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A4 5092 bytes
font_01_sfnt_off0000940e.bin
8279790d133c28c2e2ffdbb6205c4ae35aca5a017a294a04cd54c1afde1142c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x940E 10088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.