Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7e935860a3ff53…

MALICIOUS

PDF

72.3 KB Created: 2020-08-28 15:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0e3ee3af98c33c4a88ca46f3833ba23 SHA-1: 46afde07defab6d3ebd45df88a080e2b4acb579e SHA-256: fc7e935860a3ff53b922b1a512383e13152793c65872db31ed5ea3423bc21d2d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be luring the user to click on the malicious URL, which is likely part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=patronus+zorro+de+significado
    • http://konuxog.myhealthyhaven.org/uploads/1/3/1/4/131437246/52f90.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/birches_poem_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0436/4196/2649/files/12035525916.pdf
    • https://cdn.shopify.com/s/files/1/0438/5092/4182/files/partnership_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9752/files/57287214845.pdf
    • https://cdn.shopify.com/s/files/1/0463/6092/0219/files/arthromax_vedajie_inky.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/application_of_gis_in_environmental_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/67719143012.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/wofupemuvipepa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/89256232962.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009f88.bin
5ee8ac020977be990fb9bd340bd01b51cd914759b9b8730b5f5e503126e687b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F88 5088 bytes
font_01_sfnt_off0000b0db.bin
1e0bbb7769925a4d38fc7b9e1705b30669dc6fa22fe8653fe6de04191f94cc89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DB 1924 bytes
font_02_sfnt_off0000ba15.bin
570ca46877f0f86e78212a856a0f615e653bde6be88d3a6d8a6a98b362638394		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA15 11796 bytes
font_03_sfnt_off0000e1b0.bin
dc936c621e80cbbe11b1f44c9803fed4e2fadd1100d8a408b0a297916b1709f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 17404 bytes
font_04_sfnt_off0000fbb6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 4324 bytes
font_05_sfnt_off000109b2.bin
316225efddc3b6f7ff3c5724a7efbf4578981825aac23df380918508ebfc9103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 1932 bytes

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