Malicious PDF — malware analysis report

Static analysis result for SHA-256 49f1a9092336a71a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 02:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a82c7e2160654f32033d7921a883df0 SHA-1: 391f98ca3646e13b471791e2438cf9e70d244f66 SHA-256: 49f1a9092336a71ae87bfaed3f29e1531f468833a63780f1f0bdb4ae9b6542d4
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL is https://ttraff.cc/pify?keyword=bose+161+speaker+system+manual, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the Bose speaker manual lure and the malicious redirector URL.

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.cc/pify?keyword=bose+161+speaker+system+manual
    • http://files.evolvingtruths.com/uploads/1/3/0/7/130740055/vabotafenutus-dasovog-xikuzoj-tigowutapo.pdf
    • http://files.thefashionanalyst.com/uploads/1/3/1/3/131383624/wezunawe.pdf
    • http://vejiwi.summitmartialartsacademy.com/uploads/1/3/1/3/131383791/0fcfb610074af.pdf
    • http://files.life-mdinc.org/uploads/1/3/2/7/132712093/1987969.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/around_the_way_girl_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/5984/6051/files/watchop_ep_54.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8179/files/52182911184.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/11th_botany_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/rikatokut.pdf
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/les_essentiels_franais_orthographe.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/rafejojipipodiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/18647980595.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/penguin_readers_level_2_treasure_island.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/13222380507.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9199/files/xevukesirobetebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/jogojizorejoduribuzumazu.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_off00006626.bin
7aa33701363767285f3f64f998013dfe621a116f82454c7927df40d85bd5678c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6626 5388 bytes
font_01_sfnt_off0000786f.bin
a8d71c5803bd55de27ffbad4fd88d299fc1577b39cad4544d5397b521b731162
pdf-font-stream PDF embedded font (sfnt) at offset 0x786F 10772 bytes