Malicious PDF — malware analysis report

Static analysis result for SHA-256 b474e6fb534e3e4c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 04:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd179b02362d9be53461adc7619ff1ea SHA-1: 32da3c25b99c2e18785f0c74fe10b5c05f3e87b1 SHA-256: b474e6fb534e3e4c3ce8156cb7c0de63aced5589f6bfda2458d774185fa1e5fb
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the title 'Burden in my hand tab pdf' and the URL that triggered the heuristic, suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify, which is characteristic of a link farm used to improve SEO for malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=burden+in+my+hand+tab+pdf
    • http://files.expressyourselfiepb.com/uploads/1/3/1/3/131380337/2855440.pdf
    • http://files.iittlesiz.com/uploads/1/3/1/3/131383480/ba4d570.pdf
    • http://files.goyayas.com/uploads/1/3/1/8/131871586/7115303.pdf
    • https://cdn.shopify.com/s/files/1/0433/5842/1142/files/arabian_nights_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/93543739578.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/87803729637.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/libertarian_paternalism_is_not_an_oxymoron.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5276/files/kanoravaso.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/diy_laptop_stand.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/watixisitemufefisawedawa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/73737421795.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/29278630164.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/65498004035.pdf
    • https://cdn.shopify.com/s/files/1/0435/1531/4330/files/wepawonimasazejefoliva.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/adventure_capitalist_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/debabobe.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_off000063cc.bin
991711ff7e059ca2a2df508c9eaa40ab71c6da7cd1b13313fc581642f6add99e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CC 5360 bytes
font_01_sfnt_off000075e2.bin
91ce06177fa13e9a8f4ce8f74bd3f7c2bb350957aad9900795f40e73d2b2d0c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 15584 bytes

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