Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78714b508a13fee…

MALICIOUS

PDF

191.8 KB Created: 2020-08-07 23:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da6495a2c970e2b491c025936ec584ec SHA-1: ecf626e55591c2b18508906c204414bfee512aee SHA-256: e78714b508a13fee702f52aae197607922d32ba9c507130f058fcf9c46dde76e
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.cc/pify?keyword=andres+bello+poemas+pdf' is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=andres+bello+poemas+pdf
    • http://files.the-trilinq-sg.com/uploads/1/3/0/9/130969966/xutogozepobo-lagene.pdf
    • http://files.cynthiadiggs.com/uploads/1/3/0/7/130739247/5568408.pdf
    • http://files.desertofmyeye.com/uploads/1/3/0/8/130813692/6563085.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/p90x3_workout_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/sasibumefepalusiz.pdf
    • https://cdn.shopify.com/s/files/1/0441/2411/1000/files/ayyappa_swamy_songs_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/fapudewojenufaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7650/2175/files/40882577054.pdf
    • https://cdn.shopify.com/s/files/1/0440/5490/4997/files/broiler_chicken_weight_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/6744/0290/files/26342180674.pdf
    • https://cdn.shopify.com/s/files/1/0438/1235/6253/files/how_to_use_beautifulsoup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/all-_nba_team.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1487/files/tidupuwiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/bisedopuriduwodubijixa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/jiwoxisinud.pdf
    • https://cdn.shopify.com/s/files/1/0435/5522/5751/files/40813063720.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_off0002b003.bin
d137c4e9c80b18005b688c19cd4eefffa90971f85659749f3dddb95133be4283
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B003 4976 bytes
font_01_sfnt_off0002c0b5.bin
cb2a3ef54b5a3bdb2ff1e1ca40a04ac371976291c3f8d6fd72a516f9e5c6f311
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0B5 10156 bytes
font_02_sfnt_off0002e369.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E369 4324 bytes