Malicious PDF — malware analysis report

Static analysis result for SHA-256 104e14a7c021adbd…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 18:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47c657794f031981938f409306317556 SHA-1: 8595548e2217e7298a271ef02703afd00caffd99 SHA-256: 104e14a7c021adbd701d77d72d63b4f50fd7a30b0ad860911634a3a569815888
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm of 30 Shopify URLs, with one primary link pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=exponents+worksheet+pdf+algebra`. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=exponents+worksheet+pdf+algebra
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/10306893785.pdf
    • https://cdn.shopify.com/s/files/1/0434/9313/0390/files/92498423400.pdf
    • https://cdn.shopify.com/s/files/1/0463/1049/0277/files/94536683781.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/building_construction_by_rangwala_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/kuwarexuve.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/android_studio_profiler_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0431/4959/0690/files/asphyxia_neonatal.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0180/files/37932108105.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/sony_vegas_13_crack.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/73681401388.pdf
    • https://cdn.shopify.com/s/files/1/0434/9467/0498/files/14337341868.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5248/files/banilivopixukumafifuta.pdf
    • https://static.usrfiles.com/ugd/89c6ad_6c256e7ecd84475281f0522594669bb7.pdf
    • https://static.usrfiles.com/ugd/b8c837_96b2e90230c841c2ac1b7b735ba3c03a.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_14cf9f1635704e34845be054d004c234.pdf
    • https://static.usrfiles.com/ugd/b8c837_e10ee5f6e76d49589f79dae644af953f.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006361.bin
468c557c0ec467f0f7ec74f41cbbd0b6fd90e80c1d19a9bf1beabb7234a137cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 5624 bytes
font_01_sfnt_off00007693.bin
b054b784f739d88bca54efeb6b477d70580c008a527bd63c349a0dace43cbcd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 10000 bytes