Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49af98cbc2bd5f3…

MALICIOUS

PDF

46.3 KB Created: 2020-07-18 20:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46ee66eeb02183bcd63aef7387649cc6 SHA-1: b7419eb2d7ae82144c7602e05ad59b6d812395fb SHA-256: d49af98cbc2bd5f34420bd27b9ff77952662ab78562c391200c68b1b22c0f9fc
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to SEO link farms designed to mimic legitimate download sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure for a 'free download' of a programming PDF, aligning with the malicious redirector and link farm findings. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=head%20first%20javascript%20programming%20pdf%20free%20download
    • http://files.morterboard.com/uploads/1/3/2/7/132740637/ziwoli.pdf
    • http://files.pklblwinners.com/uploads/1/3/1/6/131636689/2369329.pdf
    • http://files.mygrmobilervrepair.com/uploads/1/3/2/3/132303378/6724207.pdf
    • http://files.morterboard.com/uploads/1/3/2/7/13
    • https://sedibim.files.wordpress.com/2020/07/sinuzutovifafaverudekej.pdf
    • https://bugigos.files.wordpress.com/2020/06/dewiz.pdf
    • https://matabimini.files.wordpress.com/2020/07/raminasatadisebez.pdf
    • https://tesezumig.files.wordpress.com/2020/07/73734935484.pdf
    • https://supufomubegu.files.wordpress.com/2020/07/50855018234.pdf
    • https://womaserimew.files.wordpress.com/2020/07/noloziniwubatoxinodut.pdf
    • https://savuwasewu.files.wordpress.com/2020/07/bukavolugonofulikasilope.pdf
    • https://duvurenakusa.files.wordpress.com/2020/06/21080506597.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/xijexafifodozofuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6565103434.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/84602540363.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/vazalubusexujulesuli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/lonano.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/xedasul.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/25830169942.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/94204272925.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_off00007679.bin
4654916c1d376964c37576e7d7533adcc59942d9acb921df83119dc3381c39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 5452 bytes
font_01_sfnt_off000088fe.bin
9a008691aa67fa5366c1a5b5269ef75fd84fc1bc5d43f0b94e9e3e9f9597509c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88FE 10100 bytes

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