Malicious PDF — malware analysis report

Static analysis result for SHA-256 add2d936796ffb70…

MALICIOUS

PDF

43.9 KB Created: 2020-08-16 18:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1818fa60e7ce5822b1ae8c35492f83d0 SHA-1: 698fd7184a03d9a961fb5a4e5d963623023ff04d SHA-256: add2d936796ffb70bc614e8ebf321850dad0420849dd335ad3cc2cc9dee8e189
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to malicious infrastructure. The document body, though partially corrupted, contains the text 'Bernina bernette 334d overlocker manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=bernina+bernette+334d+overlocker+manual
    • http://debir.inspirationsbyanneke.com/uploads/1/3/1/3/131380600/worujuj.pdf
    • http://melafumu.jakesimplements.com/uploads/1/3/0/8/130874278/6261388.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/57644645815.pdf
    • https://cdn.shopify.com/s/files/1/0435/7675/4344/files/dofezeniwumikibis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/wonasavowixev.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2818/files/papiresopikinoxugemap.pdf
    • https://cdn.shopify.com/s/files/1/0427/9726/9159/files/four_seasons_bora_bora_activities.pdf
    • https://cdn.shopify.com/s/files/1/0429/5943/7975/files/42983175028.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/texas_sales_and_use_tax_exemption_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/patofisiologi_bendungan_asi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/6587299005.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/21_day_smoothie_diet.pdf
    • https://cdn.shopify.com/s/files/1/0438/7287/8747/files/64794783732.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/32745925998.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/89147007616.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_off00006d16.bin
936e68deddd33b851511d3c953e0191b53f6aa1879512bd31d3b75465f854901
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 5472 bytes
font_01_sfnt_off00007fa3.bin
42049a13526e2dcb76560746ce6c73ce15f1d9de6f34878cb89d640e4710b6dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA3 10076 bytes