Malicious PDF — malware analysis report

Static analysis result for SHA-256 a016a01fe4f457eb…

MALICIOUS

PDF

37.6 KB Created: 2020-08-25 17:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9f294c61becf3c9398bf5b96903920f SHA-1: 291f26e0f5a15ec5a670e304368aafed89b08688 SHA-256: a016a01fe4f457ebb2cf7cd8bfff91d850cf3ca4abccadf42b23a61e21efba08
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=photo+album+maker+apk', suggesting a lure to download potentially malicious software. The presence of numerous PDF links and a critical redirector link strongly indicates a malicious intent to drive traffic to harmful sites.

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=photo+album+maker+apk
    • http://xeximus.forkemporium.com/uploads/1/3/1/6/131606457/f1972.pdf
    • http://files.bellereidfarm.com/uploads/1/3/0/7/130775876/wopixapinikex-giduvilutox-bokevifebe.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/75989371897.pdf
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/73806810325.pdf
    • https://cdn.shopify.com/s/files/1/0447/2268/4058/files/vce_to_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/vokadigosu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/coraline_comic_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/86206857356.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/76212991713.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8311/files/duties_and_rights_of_an_auditor.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6265/files/say_your_name_song.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/centrelink_nominee_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/spc_statistical_process_control_in_injection_molding_and_extrusion.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2530/files/22661634591.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/cartesian_dualism_mind_body.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_off0000497a.bin
ee83c8de231ca1ca68b64d889c1cffdaf70ac8941604faab1798583087676e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x497A 4812 bytes
font_01_sfnt_off000059cf.bin
6bd894c5c3236f686d115666300d81a3299c8085baa8142caec5f071933816b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CF 9868 bytes
font_02_sfnt_off00007b75.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B75 4324 bytes

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