Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d875b909182cd50…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 05:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce23b86e5ac1092f8324477c6da92bb6 SHA-1: 43560f3e0cefedf9bf78e6aac858200dc00d0fcc SHA-256: 2d875b909182cd508567489833ca02336f5e3a7bc0b0190a3cdb38b1e69aea6c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as book downloads. The primary redirector link, 'https://ttraff.com/pify?keyword=light+on+life+bks+iyengar+pdf+download', points to known malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=light+on+life+bks+iyengar+pdf+download
    • http://wibules.bishopsstortfordjudo.com/uploads/1/3/1/4/131482853/931f39d8e73c9c.pdf
    • http://files.elishevaawendstern.net/uploads/1/3/0/7/130775372/8bdadf2.pdf
    • http://files.myeirestory.com/uploads/1/3/1/4/131407796/mupugupafesa-felefijijejo-ferane-volor.pdf
    • http://files.tgwca.org/uploads/1/3/1/4/131453998/tumenebalirexu.pdf
    • http://files.travelingaboutandbeyond.com/uploads/1/3/0/9/130969231/251bf0aea40795.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/48627624521.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/format_of_informal_letter_writing_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/98231134057.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1671/files/xugavuzivewikugo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/83942464302.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/18948036143.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5146/files/82320313228.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/mighty_mouse_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5500/files/15286312890.pdf
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/71746513667.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_off00006969.bin
b1d8914398eb7caacc556978ba6af75ab5c75d95a58fd05133eed43d8e38cdb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6969 5640 bytes
font_01_sfnt_off00007cad.bin
5119de6ace4810504d316cd9a9404bb9a5af48eadf256f87c872c506563eea8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 10288 bytes