Malicious PDF — malware analysis report

Static analysis result for SHA-256 de43eb758b9fdfc9…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 13:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f80e992a0cf9ecd3c4037ebe7654fbfb SHA-1: bd4da7cf5eb33f4f7816a951d660f4c2b4040dc4 SHA-256: de43eb758b9fdfc908186b60eec2e8f64c693cde3a791197b9c09ab2df691ecf
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though obfuscated, suggests a lure related to 'sample authorization letter for bank transactions'. The presence of a callback phishing lure heuristic further supports a social engineering attack. The primary malicious link identified is https://ttraff.cc/pify?keyword=sample+authorization+letter+for+bank+transactions+pdf, which likely leads to a malicious site.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=sample+authorization+letter+for+bank+transactions+pdf
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdf
    • http://files.starlovestudio.com/uploads/1/3/1/4/131453924/6281d8e18.pdf
    • http://zosumeneb.isocandles.com/uploads/1/3/0/7/130775045/vilajavudiva_gikuzezatagen.pdf
    • http://files.larkfox.org/uploads/1/3/1/8/131858661/wigewaziwalupo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5841/1158/files/xadadodeziguwumezoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/metulukagovidev.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/gabion_wall_design.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/53908876934.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/doladuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/vipotoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/java_programming_examples_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/silezeve.pdf
    • https://cdn.shopify.com/s/files/1/0436/4120/8992/files/zelozisiwet.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/70004228104.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/kipisenefanowemixezaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/another_brick_in_the_wall_solo_tab.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_off000063ab.bin
766d5dca23c064a69caa1ab6f85b17e61d51a97d92c114c63b635f19149ebc74
pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 5752 bytes
font_01_sfnt_off00007714.bin
d6ebbf381b5a8a4c952c9bb1544797c5fcccbde891e4a9a4386d5857d23f7c4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 10108 bytes