Malicious PDF — malware analysis report

Static analysis result for SHA-256 4508829635c96c56…

MALICIOUS

PDF

37.6 KB Created: 2020-08-03 11:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 857f25d3e9eb6448ad56e74806e7a645 SHA-1: e749c74bf60f9dc821aa9d56789a7fcd9d135b54 SHA-256: 4508829635c96c560ad0454f9de25692d2e1b2dd4ad3e3f5cd9f6a9e50b29efb
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=passive+voice+past+simple+exercises+pdf+with+answers'. This indicates the document is designed to redirect users to potentially harmful sites. Additionally, a heuristic for a PDF link farm was triggered, suggesting a large number of outbound links, many hosted on cdn.shopify.com, which are likely part of a SEO poisoning or link farm strategy to attract victims. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=passive+voice+past+simple+exercises+pdf+with+answers
    • http://files.carysjonesscenicpainter.com/uploads/1/3/1/6/131636644/bopigadulolemi_debif.pdf
    • http://files.hypnomads.com/uploads/1/3/1/3/131380008/kijenopun-fekufedekaparub-rotivoda-xupanotagexinaj.pdf
    • http://files.abby-humphreys.com/uploads/1/3/1/3/131398221/4202270.pdf
    • http://files.fmacademy.com.au/uploads/1/3/0/7/130776445/bamagi.pdf
    • http://files.makinglandscapes.net/uploads/1/3/2/6/132681210/7d549c3701957.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/65269676232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/povumad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/are_the_spore_servers_down.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/sifizubowobaserotajonixub.pdf
    • https://cdn.shopify.com/s/files/1/0436/3082/1529/files/20054211125.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/2552608715.pdf
    • https://cdn.shopify.com/s/files/1/0428/8249/8716/files/bametani.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7997/4556/files/monenasafepewas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/waxolufoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/knuth_morris_pratt.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1583/files/zerukasewo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3349/3655/files/69332854103.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005391.bin
3ca5b5f865cabe986c8e5696233001b846eab98bfaad37bff8da897700ba08bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5391 5616 bytes
font_01_sfnt_off0000669b.bin
f497808852adb6264d293728dbca54c8b7da367459e50cd9367aa4251d7a71e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 9964 bytes