Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcb114b1fa8304f…

MALICIOUS

PDF

50.8 KB Created: 2020-08-09 08:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4364057e4934c2cbca399d228f324c6 SHA-1: 5c47d8677c25d89fddf6d7a23a61e9a2cb2ec1c1 SHA-256: abcb114b1fa8304fde04ae53b0054fcee32faacf9aa80eaca39c2706cbb489be
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains the same lure text and URLs. This indicates the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, and the PDF structure itself is the delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=autobiographies+pdf+download
    • http://files.theseasonalcollection.com/uploads/1/3/0/8/130813269/2edb82a7a0b284e.pdf
    • http://files.americanlegionpost141.org/uploads/1/3/1/3/131379343/wezevi.pdf
    • http://wapakanax.mk-bricks.ca/uploads/1/3/0/8/130814328/gejoxijakuxila_zetitusoz.pdf
    • http://kimij.fshsalumni.org/uploads/1/3/1/0/131070420/a00401a1305.pdf
    • http://files.cobblandmarks.com/uploads/1/3/1/8/131856065/bijanotebatufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/tutat.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7603/files/xcii_in_roman_numerals.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/11849164225.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/toxizajupaxajojikuromefiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/abelmoschus_manihot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/bututagilisudorifosiw.pdf
    • https://cdn.shopify.com/s/files/1/0447/9506/8565/files/carcinoma_uterino.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/34577207797.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/67962570230.pdf
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/redofoxili.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_off000087a3.bin
ec1004966bd5b7bc69fc750904dba0e1006820ccd0a26e64f46ae757a092ef1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A3 5524 bytes
font_01_sfnt_off00009a73.bin
714f2d652589378861d03fcc9dc3162830bdfcf31ff1b37f31210406ac398522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A73 10548 bytes

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