Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfdaabf837905a82…

MALICIOUS

PDF

41.4 KB Created: 2020-08-24 23:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a265edf48c2c791380b9720e2aec9e4 SHA-1: 4cc84a5095134166e2f4bbb5be4de37cd7d4e626 SHA-256: bfdaabf837905a82155720881b3a6445089721eba6d387dde1e1c39f2edaec40
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/pify?keyword=today+weather+report+come+telugu, is identified as a known malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious sites. No scripts were extracted from this sample.

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=today+weather+report+come+telugu
    • http://pusideki.rockphenoms.com/uploads/1/3/1/6/131606420/1119340.pdf
    • http://faridipa.vanhowell.com/uploads/1/3/1/1/131164250/fagerixe.pdf
    • http://files.swifttgenergy.com/uploads/1/3/1/4/131438193/gejamuf-bowubalekifi-wekozida.pdf
    • http://files.clarinetfestivalgrancanaria.com/uploads/1/3/1/4/131406082/fc739e91c9e3e7.pdf
    • https://cdn.shopify.com/s/files/1/0463/2690/7035/files/assignment_format_front_page.pdf
    • https://cdn.shopify.com/s/files/1/0466/6694/0581/files/jukepopavison.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2715/files/ftb_revelations_shaders.pdf
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/11225762155.pdf
    • https://cdn.shopify.com/s/files/1/0437/8882/8829/files/nuxuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/91291365901.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/fallout_shelter_game_show_gauntlet_wrong_answer.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/hunter_sailboat_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/nopekazapupeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/zefitetubijabobopo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1610/8701/files/vogupiwozuwubovibemipovog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4810/files/86072677293.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/design_thinking_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/35606408230.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/vekedebojinupekeguviziwiw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048c4.bin
20c757e8abb9aca1b53f28678d9191bfb7964d549ba5ca3faa141cc5d82975b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C4 5180 bytes
font_01_sfnt_off00005a82.bin
dd74d2aef047e45a7c70c0ec7ea597b913a1e56ef696aa24b0091476dd385706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A82 3272 bytes
font_02_sfnt_off000067d3.bin
218d7531bdaca03edb67917f4379c3f8bdef638cd351aeaa9fb741b5538d5a77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 9460 bytes
font_03_sfnt_off0000883b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883B 4324 bytes

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