Malicious PDF — malware analysis report

Static analysis result for SHA-256 59afbbf9bf7b6e64…

MALICIOUS

PDF

45.7 KB Created: 2020-08-14 12:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34d8fe713388f4ea6c96938c3148b66e SHA-1: e006093121bda6286cc0ce81f5d0eef73c131b6d SHA-256: 59afbbf9bf7b6e645a081cf27e6872f9e48278b785d470396c2f2ccd649ae48f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a SEO poisoning or phishing attempt where the PDF serves as a lure to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=albergues%20camino%20primitivo%20pdf
    • http://files.mult.honest-elections.com/uploads/1/3/2/8/132814996/6274883.pdf
    • http://files.loploptravels.com/uploads/1/3/1/3/131380741/8945083.pdf
    • http://files.cfuwsouthdelta.com/uploads/1/3/2/6/132696174/c7d368d85cbf3.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/ganubufufatelugixev.pdf
    • https://cdn.shopify.com/s/files/1/0434/0609/8597/files/fur_elise_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12086745869.pdf
    • https://cdn.shopify.com/s/files/1/0436/9468/6376/files/29433133744.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/jezerareduxovopivawojoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/autocad_import_text_issues.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/typhoid_fever_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/popidujokagezokaruri.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/charity_begins_at_home_essay.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/32973707881.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4702/files/befumodi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/rooftop_swimming_pool_construction_details.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/baloney_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/29479856271.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567d.bin
9814ff66d69c4828b5fb533f74b6f70983a11898aabe199889f3409be444fffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567D 5664 bytes
font_01_sfnt_off000069b0.bin
9d9c17d28605c7a64e594cbc9ce2efd52fe71f59be9b2ae829900c1ab72d7df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B0 13332 bytes
font_02_sfnt_off0000932d.bin
37e7e7e9114bd13ff8332e6897528b8343bfbb4b2dd84d96d31ee0d9080a0a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932D 16096 bytes

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