Malicious PDF — malware analysis report

Static analysis result for SHA-256 3907733a7da808fe…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 21:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6d4e4e7aa8f290c68dbf5712c4670c5 SHA-1: 82c006d541c1981c09cfdbe3fe6473d5ce1c0d29 SHA-256: 3907733a7da808fe3aacfcd29c6f3701a11aac83ef45700c943e751ee399439c
168 Risk Score

Malware Insights

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

The PDF file contains a lure related to a "Barangay clearance application form" and embeds numerous external links. One of these links, `https://ttraff.com/pify?keyword=barangay+clearance+application+form+pdf`, is identified as a malicious redirector. The document also exhibits parser evasion techniques and a structure indicative of a link farm, aiming to distribute malicious payloads or lead users to phishing sites. The presence of multiple Shopify-hosted PDF links suggests an attempt to obscure the true malicious destination.

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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=barangay+clearance+application+form+pdf
    • http://files.pxdlabs.com/uploads/1/3/1/6/131606094/zogazulejiv.pdf
    • http://files.techviews.online/uploads/1/3/2/6/132680813/loxidemigimogebegasa.pdf
    • http://files.michaelpoznansky.com/uploads/1/3/0/7/130775998/54684aa35.pdf
    • http://files.thelandscapearchitects.com/uploads/1/3/0/7/130775357/1e7798fdbc.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/43669796347.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/vuxufuposaxuxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/93477488878.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3130/files/logotuxuvubazizuvobaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/la_la_land_audition_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/just_one_night_gayle_forman.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/wekufagogifuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8705/3471/files/35680337273.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9041/files/murray_lawn_mowers_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/kuwosora.pdf
    • https://cdn.shopify.com/s/files/1/0432/5926/5188/files/85114565971.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nofalefupipalivudekim.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/rajurubabonagiximimak.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_off000060cd.bin
28330d98fbe031e222227ff840c431efc062fc59b271bf2ed5e136d08d8a41ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60CD 5448 bytes
font_01_sfnt_off0000734c.bin
14c4b87e365736dea1bb07a0c29930ee31a8be9a600ca2a3069e184830a6a608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 9952 bytes

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