Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6cf706169f1fb8…

MALICIOUS

PDF

48.2 KB Created: 2020-08-24 17:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18844caac1089909041a2e4396a97adc SHA-1: a91723e8ff21e10010b5fd6a082e3c5873cf4c82 SHA-256: 5c6cf706169f1fb8c83efaeb9adeccb00d514c751f989b7a341829dc8662819c
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded 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=wings+of+fire+book+review+pdf", suggesting a lure to disguise malicious activity. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=wings+of+fire+book+review+pdf
    • http://files.cgenarchive.org/uploads/1/3/0/7/130774969/2c3a0dd769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/amiodarona_efectos_adversos.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/94203982811.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/ascaso_i-_mini_i2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/85610503180.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/mepefavoxupuwudowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/90246737755.pdf
    • https://cdn.shopify.com/s/files/1/0437/8794/4094/files/70061092112.pdf
    • https://cdn.shopify.com/s/files/1/0453/9875/3448/files/lorazepam_ativan_davis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/vorulalubin.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/xaleri.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a9.bin
3e43bdd63b4b27503221160706c6c14aff8d75b2dac8b618441c64acc4559215
pdf-font-stream PDF embedded font (sfnt) at offset 0x70A9 5044 bytes
font_01_sfnt_off000081e7.bin
cc9f6e8c94ac9af96faa3202c1cbabba71fe3bec1b0af967e8cfa9ec479e8fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x81E7 10596 bytes
font_02_sfnt_off0000a60b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA60B 4324 bytes