Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3503e9e7ec631c…

MALICIOUS

PDF

46.0 KB Created: 2020-08-15 00:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c5f95bf364a6d537ea40a3262a0d34 SHA-1: 6e914cc18ffa8ba60fcbc395bbecb6428fb0f528 SHA-256: 1a3503e9e7ec631ce2edc0ce66c6bee46c689785e588a8998ee3656739548671
160 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 payment or bank detail changes, a common tactic in business email compromise attacks. It embeds numerous links, including one to a known malicious redirector at `https://ttraff.cc/pify?keyword=byomkesh+o+agniban+bengali+movie`. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a link farm or redirection strategy. The primary goal appears to be directing the user to malicious infrastructure.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=byomkesh+o+agniban+bengali+movie
    • http://files.pollymeyrick.com/uploads/1/3/1/0/131070302/33f70e4.pdf
    • http://files.jennacole.org/uploads/1/3/1/8/131858791/duvibijafagudad.pdf
    • http://muveral.baigoftricksentertainment.com/uploads/1/3/1/3/131379295/35e997a4f20.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/13139500997.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/introduction_to_quantitative_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/best_arabic_keyboard_for_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/zexer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/82177428871.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/79014599879.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1774/files/can_t_buy_me_love_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/6501/5460/files/27128203614.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/euclid_mathematician_information_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0435/7813/0593/files/janori.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c26.bin
78bcff4fc702e33e81cb991b310b7665e1c5e3b8abf91cbfbc28c7e134c4b748
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 5420 bytes
font_01_sfnt_off00006e8b.bin
c539178cde6a45067c5cb56a28994866861f6f2d576148714cfa08a3041ba6aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8B 7332 bytes
font_02_sfnt_off0000866f.bin
1f9103ee36dc88f910c3a48c775f45d15980f409252d97df031526fd17627004
pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 10060 bytes