Malicious PDF — malware analysis report

Static analysis result for SHA-256 0471f88ae346796b…

MALICIOUS

PDF

57.5 KB Created: 2020-08-06 18:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fad3397cf84e32be8b56d97f1be5dc0d SHA-1: 87d7295efdfa41a61fd82cc6702f08a47f4ff361 SHA-256: 0471f88ae346796b8c615b8ac66dbea7cacf69dff420273c0e3f664259defef1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=deep+learning+pdf+yoshua+bengio
    • http://files.nottinghammassage.com/uploads/1/3/0/9/130970009/vefefimow_bitijufo.pdf
    • http://files.centerforartandhealing.com/uploads/1/3/1/3/131379382/313933.pdf
    • http://files.africanqueensdance.com/uploads/1/3/1/3/131380263/juxifuzesavebokizojo.pdf
    • http://files.kennylakehawks.com/uploads/1/3/1/3/131384171/xiluxunovanebek.pdf
    • http://xeremani.nextgenerationjr.com/uploads/1/3/1/1/131163667/1221750.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/rebaxatusafofexitev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/puxisaberiligep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/mafizolavezagi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/12609953392.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/80510133448.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1041/files/12097089519.pdf
    • https://cdn.shopify.com/s/files/1/0440/4376/3862/files/80970599792.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1956/files/visual_studio_2015_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/gudobolurote.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/gapasavikif.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/network_plus_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/58736419618.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/catalogo_de_price_shoes_urbano_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/tuwopaxowigudowa.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e8.bin
3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E8 6440 bytes
font_01_sfnt_off000079dc.bin
7bf98933812cdd941676ab3f24e5e625d2325be445f4b3ab12753d46b8027b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DC 5344 bytes
font_02_sfnt_off00008bfb.bin
641ab3a4db86ad64d1afb87973547e019966d9ff3cebc8fad32fefd4359ad0dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFB 11204 bytes
font_03_sfnt_off0000b26c.bin
a28d3229aadcd3191a302dd0d5d06c010de27a3af1a9c48acffef130cd8870e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB26C 16896 bytes
font_04_sfnt_off0000ca09.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA09 4324 bytes

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