Malicious PDF — malware analysis report

Static analysis result for SHA-256 155753fe8967e594…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 23:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf50116353cef3ca198481f02f32a63a SHA-1: c99d3dce96ffc9393a1eb2fe3efad04890a6c2ec SHA-256: 155753fe8967e594b3256aa85ef652c3fe34cade15519b5ba1b6a169b89f37f1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious due to its use of a link farm and a redirector to known malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for an advance-fee scam, likely by presenting a fake document to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which is designed to lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=abstract+algebra+books+pdf
    • http://files.kpuhra.com/uploads/1/3/1/6/131637224/323866.pdf
    • http://files.portraitreflections.net/uploads/1/3/0/8/130874146/9783001dddc0e42.pdf
    • http://files.hannahjrule.com/uploads/1/3/2/7/132740277/kusivezawate-fitiw.pdf
    • http://files.appalachianwild.org/uploads/1/3/0/8/130874045/zoxozafabo.pdf
    • http://files.karenmussernortman.com/uploads/1/3/1/0/131070867/7c22e82225116c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/86236052226.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/vitatunufaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/sopotizakozowezewuredoxa.pdf
    • https://cdn.shopify.com/s/files/1/0443/9562/6662/files/bee_story.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/53107301861.pdf
    • https://cdn.shopify.com/s/files/1/0438/1723/8688/files/the_blood_mirror_brent_weeks.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/18348310951.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6008/files/unscramble_words_worksheet_for_grade_4.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650c.bin
156523d3ee1723b86ee209dcf56df72fe7aa56ce19f4a6add7bc0e14d4bbf097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650C 5516 bytes
font_01_sfnt_off000077ce.bin
6ae1e96f2ccd9696b4eac0c96b569a992a6fe6909ea93416e97dac5dac83c61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CE 10696 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.