Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb3877ddf80fc47…

MALICIOUS

PDF

62.4 KB Created: 2020-08-09 17:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ccf39a85da41ea16b0c8f435ec6065 SHA-1: 24fe322f4dfdd1533fcd155f69f137d345ba9b22 SHA-256: 7bb3877ddf80fc47a473d90a64031c02507aac05a1f070ab70f9240310c86e7f
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=destilaci%25C3%25B3n+por+arrastre+de+vapor+fundamento+pdf`. The heuristic `PDF_SEO_LINK_FARM` indicates a mass of external PDF links, suggesting a link farm or SEO poisoning attempt. The presence of a password protection lure heuristic suggests an attempt to bypass gateway security by encrypting a payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=destilaci%25C3%25B3n+por+arrastre+de+vapor+fundamento+pdf
    • http://files.jimhockenhull.com/uploads/1/3/1/0/131070560/7682953.pdf
    • http://files.fabricamnl.com/uploads/1/3/0/7/130775701/xogojun_xaruperivezuxut.pdf
    • http://sudotun.mooremiracles.com/uploads/1/3/2/6/132681488/19734b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/limfoma_burkitt_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/tiruzawagabatekemopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/13013403108.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/lowupuvirowonuwu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4020/9056/files/50709268797.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/52683650574.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/16876439474.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/4710288992.pdf
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/porsche_944_wiring_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9517/files/rudilulebusiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/puwibebupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/vomuparibumuxusodukaxo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ca7.bin
8d371f20a173a0f63f2ad839937c89b1f374dbe20ad7dbb80d4215d1508334b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA7 5496 bytes
font_01_sfnt_off0000af12.bin
0fbff7e9ec3823a5b12c179a8b6cc5e1063894057850c5e5e650bb5f6afcbd97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF12 11556 bytes
font_02_sfnt_off0000d49c.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD49C 16204 bytes

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