Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b860aab595638d8…

MALICIOUS

PDF

49.6 KB Created: 2020-08-02 10:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11d8f5062644c4d7dc75a68befb49325 SHA-1: b1da55ce6e1b9935d1d5127ae9459c8d803e60be SHA-256: 1b860aab595638d8ea8e34acd6fb4266b025251a9cb61c1dcd858216750bcdc9
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.com/pify?keyword=vw+jetta+manual+transmission+shifting+problems. The document body, though partially corrupted, also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious 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.com/pify?keyword=vw+jetta+manual+transmission+shifting+problems
    • http://files.mattcameron949.com/uploads/1/3/0/8/130874333/norazapatuji_zulogawa_benujesazurenov_wudona.pdf
    • http://files.waymoretrans.com/uploads/1/3/1/8/131856071/4a2baed.pdf
    • http://files.ljkplumbingandheating.co.uk/uploads/1/3/1/4/131406717/wuvalelezo_gobubuzodobeteb_sojozajasa_sejimumameg.pdf
    • http://files.mvnighthawkbasketball.com/uploads/1/3/0/9/130969059/xuteropaladu_vefiw_dokenoxa_bidejumu.pdf
    • http://files.similandiveguide.com/uploads/1/3/2/6/132681586/nuriforuruvematanavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/nys_notary_exam_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/canon_poweshot_s2_is.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/8454161499.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/vovewol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/pipeletujikodunetaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/95088892964.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tedogunugovosilogupex.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/51195993813.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29876283886.pdf
    • https://cdn.shopify.com/s/files/1/0432/6254/1982/files/tulajiwijonopigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/90592786226.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_off000074ef.bin
9eefbb9c9516ac05595fcc98d63ffe29f8d63ccfa546dee20fcfc67953852ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EF 5468 bytes
font_01_sfnt_off0000876c.bin
62accf82afe1aca67ddcaf1e4908596812792af28d92c371e8fe410974a1bb4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x876C 10316 bytes
font_02_sfnt_off0000aac0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC0 4324 bytes

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