Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f5460f1efc90ed…

MALICIOUS

PDF

42.9 KB Created: 2020-08-14 23:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc91fdb2b7506ff44eba5f4003d38ffe SHA-1: aa287a71336554a7c0e495dfd24daf89c98587b5 SHA-256: 56f5460f1efc90edcdd738a0d5d7a998dd150cd344d813815c9cca4e210bc4e9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=munda+lineman+lagya+balkar+sidhu+song'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on shopify.com. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a potentially harmful site.

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=munda+lineman+lagya+balkar+sidhu+song
    • http://files.adventuresinmiramichi.com/uploads/1/3/1/3/131378990/08f1352cd6.pdf
    • http://files.pcelpc.org/uploads/1/3/0/7/130738512/5136304.pdf
    • http://jobomej.simplydeliciouswaco.com/uploads/1/3/1/3/131384021/kemazibarunanuf.pdf
    • http://geronog.hotelsax.cz/uploads/1/3/1/4/131437987/1becfe949c446c.pdf
    • http://files.innerselfcreations.com/uploads/1/3/0/7/130739918/tajevez.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/84240898597.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/20691020562.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakisone.pdf
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/waxage.pdf
    • https://cdn.shopify.com/s/files/1/0437/2076/9685/files/learn_korean_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/jidudatupakewigafivijon.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/2108553627.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/89544461894.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/2127579403.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051eb.bin
275140d8e556bff16c4ed771066ea160bb6668a523cd9e1ea2cb836360f5dac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x51EB 5548 bytes
font_01_sfnt_off000064a2.bin
b632a0bb5d88742e455b2137ec698ea00a3facce2f34d2040af253881257e3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A2 3576 bytes
font_02_sfnt_off0000730a.bin
5d040e5735782c3d7dd28d04fd1ad399b00da0c1559e1814e0385b090454f629
pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 13744 bytes