Malicious PDF — malware analysis report

Static analysis result for SHA-256 131603c937811085…

MALICIOUS

PDF

44.4 KB Created: 2020-07-31 23:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 006346b277754238a492b3f90894289f SHA-1: 413de9b6b7f002c41b5dbb35cec3270daf7c2a8e SHA-256: 131603c9378110855d710caf01ab50629d3fffddd38d6c099e51d09d2fd28559
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a link farm designed to redirect users. The primary redirector URL, 'https://ttraff.cc/pify?keyword=javascript+save+to+file', is flagged as malicious. The document body also contains this URL, suggesting an attempt to lure users into clicking it. The presence of many PDF links indicates a potential SEO poisoning or traffic generation scheme, likely leading to malicious content or phishing pages.

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=javascript+save+to+file
    • http://files.ororossodelmonferrato.com/uploads/1/3/1/1/131163632/1350963.pdf
    • http://files.snowypeaksoap.com/uploads/1/3/2/3/132302973/a7512c13cdce8e.pdf
    • http://files.livingthejoy.net/uploads/1/3/2/6/132681479/15dfdeaa21a17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/werebezabiwulizedutamigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/65046062320.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/7699954312.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/vaneluxazobetipamubun.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/5392954057.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/beponakoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/18885605494.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/74886032426.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/57581219551.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/ravifabejeziv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/lotumasajifakizatume.pdf
    • https://cdn.shopify.com/s/files/1/0438/2693/8018/files/jizixifedano.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/lubuduzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/foxarenizod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000631a.bin
df64a9337f32f05e634ac668c4b0fc3660547175545b67c738fa86ff015069ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 4740 bytes
font_01_sfnt_off00007349.bin
a57f7c62079441a69b2ff2746aede9f29cbe3b2c1a57b586bbdc6dffc10e9833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7349 10380 bytes
font_02_sfnt_off000096d7.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D7 4324 bytes

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