Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15564c14edf9bb3…

MALICIOUS

PDF

73.3 KB Created: 2020-08-21 10:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d374d10e363586c4c9f3f83fda0f2383 SHA-1: f8cc19072a4e301488829f34b5d34a9b5061b12c SHA-256: a15564c14edf9bb3897191cdb6cdfbac94f47ead5cd0cfd1a9c43b0bdae6d903
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a search result for 'Europa league predictions bleacher report'. The document also features a large number of links to other PDFs hosted on Shopify, likely part of a link farm to manipulate search engine rankings. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.ru/pify?keyword=europa+league+predictions+bleacher+report
    • http://migok.whiteoakumc.org/uploads/1/3/1/3/131398455/2598092.pdf
    • http://fozowadeb.parramattagaolghosttours.com.au/uploads/1/3/0/7/130739275/8851094.pdf
    • http://nogobodup.worldtravelhacker.com/uploads/1/3/1/4/131453133/bodujazagarize-savupesijuj.pdf
    • http://files.azmomsco.com/uploads/1/3/1/4/131409463/57f44.pdf
    • https://cdn.shopify.com/s/files/1/0443/3153/2444/files/endless_night_agatha_christie_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/dictionary_english_english_marathi_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/58709571351.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/gefinobus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/vmware_workstation_pro_15_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/migogudugemewiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/wopatinikowupasakev.pdf
    • https://cdn.shopify.com/s/files/1/0437/7526/2869/files/2915757875.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/48034935441.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/botanica_plantas_medicinales.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/zugitipevamawijokox.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://t.co/sjGTDCQ
    • 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ee6.bin
53e577dd660245c0790aeb3dc51c7dcdf2f53445d2a1340ae678de6db9207fd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE6 7052 bytes
font_01_sfnt_off000090d3.bin
95b8098a4042feaabcbc2eb97379a5d053fb975780bc29df41deb7d226d425c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D3 3136 bytes
font_02_sfnt_off00009bff.bin
48382e102e477f0d095ae23eb114e09fab157514804c7b048c79730f5c7411b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFF 5432 bytes
font_03_sfnt_off0000ae64.bin
1ae56ee299c5e5db4564fd7fed6e71b74306dadfcace039ea903bacfe0b46829		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE64 9032 bytes
font_04_sfnt_off0000cbb9.bin
ea03fcabb2ed88be7ee7d5c97715e85cd6fa2551532daee89630c3b226e798f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 15568 bytes
font_05_sfnt_off0000fc6a.bin
e42ab028119d0091381de8616b493655809d2ef210100f787145d8ecee9c3c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6A 17332 bytes

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