Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b39a8391f0fd41…

MALICIOUS

PDF

46.3 KB Created: 2020-08-17 18:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b3f8a464e05fcc5bc50ea4447128d3 SHA-1: 94fe7bef5fa3cc81057053be0b34463d33e07008 SHA-256: 00b39a8391f0fd41a37d36a6cc13c5378e73ee2beff99713b75e6e12e3d57e1a
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting a social engineering lure related to a book summary. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or distributing malicious content.

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=awaken+the+giant+within+pdf+summary
    • http://files.kabirchopra.com/uploads/1/3/1/1/131164473/5105702.pdf
    • http://files.fccsewingministry.com/uploads/1/3/1/8/131871970/mopeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9751/2354/files/fesatuditemenijafif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80084587067.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0433/6841/5400/files/worenelope.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4503/files/b_m_sharma_cengage.pdf
    • https://cdn.shopify.com/s/files/1/0439/6023/8238/files/zurizitekoluwajonufilako.pdf
    • https://cdn.shopify.com/s/files/1/0437/5304/6165/files/hungry_shark_mod_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/speak_now_2_student_book_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007765.bin
a54000deee673ad0dc598a95a29205a96f00471e416fc18744ae04dbcc5470c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7765 5672 bytes
font_01_sfnt_off00008aa5.bin
65943efc3769125acf2bb5d53f933fd07ef480a34705224b92448d2d76ec5e0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA5 9996 bytes