Malicious PDF — malware analysis report

Static analysis result for SHA-256 939ee6321b52a362…

MALICIOUS

PDF

43.3 KB Created: 2020-08-19 05:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea1f04689eca021e2995fe13725ef5c SHA-1: f980b2b8e0b74aaed586184575d50bc8adec5b52 SHA-256: 939ee6321b52a362338c9fa9569c35a0fa868fb92a5b444618b306bb4b5cea9d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=vsco+cam+full+cracked+apk'. This URL is flagged as malicious and is likely used to lure users into downloading further malware or engaging in phishing activities. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm strategy to improve search engine ranking for malicious content.

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=vsco+cam+full+cracked+apk
    • http://mubef.atwbswimming.com/uploads/1/3/1/3/131380480/pizagotafujo_sunimisowu_kimizegupugiw_zizegajuxagov.pdf
    • http://files.notlostmx.com/uploads/1/3/1/4/131438692/7811126.pdf
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/zadukidujoluwinakuvofofir.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/xemuse.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/hemolytic_anemia_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/75510937967.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/a_level_computer_science_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/report_on_handicraft_business_in_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/download_software_to_word_untuk_pc.pdf
    • https://cdn.shopify.com/s/files/1/0452/4258/1153/files/agreement_of_sale_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/7th_grade_math_practice_test.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_off000069f2.bin
4aae47cd32c45719a5ade03cb247d6fc20053582bfd3bff3da16cdd813bb951d
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F2 5332 bytes
font_01_sfnt_off00007c00.bin
4b37bc5dfe54a5b98554658ab956021a1c0edb09f237437dc5da75fbe6921dce
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C00 10772 bytes