Malicious PDF — malware analysis report

Static analysis result for SHA-256 a018ed367babc814…

MALICIOUS

PDF

63.3 KB Created: 2020-08-26 10:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d89a6f261d50aeb38c366d9694954b77 SHA-1: e39ed3a527d2426e1becbda797540ceab763dff6 SHA-256: a018ed367babc81435a2add0ae2f0236f082e76d91235cb0aca8bffdc8877933
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Sloss debate pros and cons' and the malicious URL 'https://ttraff.cc/pify?keyword=sloss+debate+pros+and+cons', suggesting a lure to a phishing or malware site. 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.cc/pify?keyword=sloss+debate+pros+and+cons
    • http://files.carolinastormhedgehogs.com/uploads/1/3/1/6/131637291/fanipewonosewagafuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/xasimi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1551/0952/files/dimomigivopuzoxafipifegeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/20277453759.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/53113539710.pdf
    • https://cdn.shopify.com/s/files/1/0441/1061/0584/files/vimuligesosopal.pdf
    • https://cdn.shopify.com/s/files/1/0429/4118/6215/files/pearson_verbal_ability_and_reading_comprehension.pdf
    • https://cdn.shopify.com/s/files/1/0436/2380/9187/files/34797674548.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/matedomamaxibufuvezemabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/69591232357.pdf
    • https://cdn.shopify.com/s/files/1/0437/5832/1818/files/kodosanewirakanitirinari.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_off0000bbfa.bin
0b5dcdd9a090e34c6a2b6fb167eb4bfe287e7f7bc78cb439bbb01d1ac6b6ebad
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFA 5312 bytes
font_01_sfnt_off0000ce01.bin
ac74493d40b0224de0f803b76a318ba3976e1e6c34c6b12d0c1a5d9aef5b7b81
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE01 10196 bytes